package com.neusoft.elm.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.neusoft.elm.dao.FoodDao;
import com.neusoft.elm.po.Food;
import com.neusoft.elm.util.DBUtil;

public class FoodDaoImpl implements FoodDao{
	 private Connection con = null;
	 private PreparedStatement pst = null;
	 private ResultSet rs = null;
	 
	 @Override
	 public List<Food> listFoodByBusinessId(Integer businessId) {
		 List<Food> list = new ArrayList<>();
		 String sql = "select * from food where businessId=?";
		 try {
			 con = DBUtil.getConnection();
			 pst = con.prepareStatement(sql);
			 pst.setInt(1, businessId);
			 rs = pst.executeQuery();
			 while(rs.next()) {
				 Food food = new Food();
				 food.setFoodId(rs.getInt("foodId"));
				 food.setFoodName(rs.getString("foodName"));
				 food.setFoodExplain(rs.getString("foodExplain"));
				 food.setFoodPrice(rs.getDouble("foodPrice"));
				 food.setBusinessId(rs.getInt("businessId"));
				 list.add(food);
			 }
		 } catch (SQLException e) {
			 e.printStackTrace();
		 } finally {
			 DBUtil.close(rs, pst, con);
		 }
		 return list;
	 }
	 
	 
	 @Override
	 public int saveFood(Food food) {
		 int result = 0;
		 String sql = "insert into food values(null,?,?,?,?)";
		 try {
			 con = DBUtil.getConnection();
			 pst = con.prepareStatement(sql);
			 pst.setString(1, food.getFoodName());
			 pst.setString(2, food.getFoodExplain());
			 pst.setDouble(3, food.getFoodPrice());
			 pst.setInt(4, food.getBusinessId());
			 result = pst.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(null, pst, con);
		}
		 return result;
	 }

	 
	 @Override
	 public Food getFoodById(Integer foodId) {
		 Food food = null;
		 String sql = "select * from food where foodId=?";
		 try {
			 con = DBUtil.getConnection();
			 pst = con.prepareStatement(sql);
			 pst.setInt(1, foodId);
			 rs = pst.executeQuery();
			 while(rs.next()) {
				 food = new Food();
				 food.setFoodId(rs.getInt("foodId"));
				 food.setFoodName(rs.getString("foodName"));
				 food.setFoodExplain(rs.getString("foodExplain"));
				 food.setFoodPrice(rs.getDouble("foodPrice"));
				 food.setBusinessId(rs.getInt("businessId"));
			 }
		 } catch (SQLException e) {
			 e.printStackTrace();
		 } finally {
		 	 DBUtil.close(rs, pst, con);
		 }
		 return food;
	 }
	 
	 @Override
	 public int updateFood(Food food) {
		 int result = 0;
		 String sql = "update food set foodName=?,foodExplain=?,foodPrice=? where foodId=?";
		 try {
			 con = DBUtil.getConnection();
			 pst = con.prepareStatement(sql);
			 pst.setString(1, food.getFoodName());
			 pst.setString(2, food.getFoodExplain());
			 pst.setDouble(3, food.getFoodPrice());
			 pst.setInt(4, food.getFoodId());
			 result = pst.executeUpdate();
		 } catch (SQLException e) {
			 e.printStackTrace();
		 } finally {
			 DBUtil.close(null, pst, con);
		 }
		 return result;
	 }
	 
	 @Override
	 public int removeFood(Integer foodId) {
		 int result = 0;
		 String sql = "delete from food where foodId=?";
		 try {
			 con = DBUtil.getConnection();
			 pst = con.prepareStatement(sql);
			 pst.setInt(1, foodId);
			 result = pst.executeUpdate();
		 } catch (SQLException e) {
			 e.printStackTrace();
		 } finally {
			 DBUtil.close(null, pst, con);
		 }
		 return result;
	 }
	 
}
